KR102460472B1 - Touch sensing system, display device, active pen, and pen recognizing method - Google Patents

Abstract

The present embodiments relate to a touch sensing system, a display device, an active pen, and a pen recognition method, and more particularly, the active pen provides pen identification information to the display device through a predetermined path, thereby enabling rapid and accurate pen recognition. In addition, the present invention relates to a touch sensing system, a display device, an active pen, and a pen recognition method capable of simultaneously processing pen input through a plurality of active pens by distinguishing and recognizing a plurality of active pens.

Description

Touch sensing system, display device, active pen and pen recognition method

The present embodiments relate to a touch sensing system, a display device, an active pen, and a pen recognition method.

As the information society develops, the demand for a display device for displaying an image is increasing in various forms, and in recent years, various display devices such as a liquid crystal display device, a plasma display device, and an organic light emitting display device are utilized.

Among these display devices, there is a display device capable of providing a touch-based input method that allows a user to easily and intuitively and conveniently input information or commands by breaking away from a conventional input method such as a button, a keyboard, and a mouse.

In addition, these days, requirements for application functions such as accurate positioning, movement trajectory input, and handwriting input, rather than a simple touch, are increasing.

Accordingly, the display device should be able to accurately detect a simple touch of a finger, a pen, etc., as well as accurately recognize a pen for accurate positioning, movement trajectory input, handwriting input, and the like.

However, currently, pen recognition is not accurately performed, which causes a sense of heterogeneity or inconvenience in pen input.

In addition, since recognition processing for a plurality of pens is not performed, it is impossible to use a plurality of pens in one display device.

Against this background, the present embodiments may provide a touch sensing system, a display device, an active pen, and a pen recognition method capable of rapidly and accurately pen recognition.

In addition, according to the present embodiments, a touch sensing system and a display device capable of simultaneously processing pen input through a plurality of active pens by distinguishing and recognizing a plurality of active pens and separately processing pen data for the plurality of active pens , an active pen and a pen recognition method may be provided.

In addition, the present embodiments provide a touch sensing system, a display device, an active pen, and a pen recognition method that enable reliable transmission and reception of information required for pen recognition when a signal is transmitted and received between an active pen for pen recognition and a display device. can

In addition, the present embodiments may provide a touch sensing system, a display device, an active pen, and a pen recognition method capable of simultaneously and accurately and rapidly sensing a touch by a finger and a touch by an active pen.

These present embodiments will be described in more detail.

The present embodiments may provide a touch sensing system including an active pen, a panel on which a plurality of touch electrodes are disposed, and a display device that interworks with the active pen to perform pen recognition processing.

The active pen may emit a pen pulse signal indicating pen identification information to the panel through a pen tip, and wirelessly transmit pen data through a built-in pen wireless communication unit.

The display device includes a touch sensing circuit that supplies a first panel driving pulse signal to the panel and outputs raw data read from the panel from which the pen pulse signal is emitted, and receives pen data wirelessly transmitted from the active pen. and a wireless communication module that outputs the data, and a touch controller that acquires pen identification information from the raw data output from the touch sensing circuit, and performs pen recognition processing based on the acquired pen identification information and the pen data output from the wireless communication module. can do.

The active pen may wirelessly transmit pen identification information in addition to pen data including at least one of pen pressure, pen tilt, and control information through the pen wireless communication unit.

In this case, the wireless communication module of the display device may receive the pen identification information and the pen data and output them to the touch controller.

The touch controller may perform pen recognition processing using raw data output from the touch sensing circuit, pen data output from the wireless communication module, and pen identification information.

The present embodiments may provide a display device that performs pen recognition processing in association with an active pen.

Such a display device includes a panel on which a plurality of touch electrodes are disposed, and a row in which a pen pulse signal radiated from an active pen to the panel as a first panel driving pulse signal is supplied to the panel and a pen pulse signal in which pen identification information is expressed is read through the panel. A touch sensing circuit that outputs raw data, a wireless communication module that receives and outputs pen data wirelessly transmitted from an active pen, and a pen obtained by acquiring pen identification information from the raw data output from the touch sensing circuit It may include a touch controller that performs pen recognition processing based on the identification information and pen data output from the wireless communication module.

The present embodiments provide a panel that includes a plurality of data lines disposed in a first direction, a plurality of gate lines disposed in a second direction, and a plurality of touch electrodes for touch sensing, and interoperates with an active pen. can

During the display driving period, the image data signal may be applied to the plurality of data lines and the gate signal may be applied to the plurality of gate lines.

In addition, the touch driving section corresponding to the blank section between the two display driving sections may include an up-link transmission section and a down-link transmission section.

During the down-link transmission period within the touch driving period, the first panel driving pulse signal may be applied to all or part of the plurality of touch electrodes.

During the up-link transmission period within the touch driving period, a second panel driving pulse signal or a third panel driving pulse signal, which is distinguished from the first panel driving pulse signal, may be applied to all or part of the plurality of touch electrodes.

During the down-link transmission period within the touch driving period, a signal corresponding to the first panel driving pulse signal may be applied to all or part of the plurality of data lines.

During the down-link transmission period within the touch driving period, a signal corresponding to the first panel driving pulse signal may be applied to all or part of the plurality of gate lines.

The present embodiments provide a pen tip in contact with or close to a panel of a display device, an analog front-end receiver that receives a first panel driving pulse signal supplied to the panel through the pen tip, and based on the first panel driving pulse signal It is possible to provide an active pen including an analog front-end transmitter that emits a pen pulse signal indicating pen identification information through a pen tip, and a pen wireless communication unit that wirelessly transmits pen data.

The pen wireless communication unit of the active pen may wirelessly transmit pen identification information in addition to pen data.

The present embodiments include the steps of: supplying, by the display device, a first panel driving pulse signal to a panel; Radiating and wirelessly transmitting pen data, the display device performs pen recognition processing based on raw data generated by reading from the panel to which the pen pulse signal is emitted, and pen data wirelessly transmitted from the active pen It is possible to provide a pen recognition method comprising the step of:

The active pen may wirelessly transmit pen identification information in addition to pen data.

The present embodiments may provide a display device including an active pen and a panel on which a plurality of touch electrodes are disposed, and performing pen recognition processing in association with the active pen.

The active pen may emit a pen pulse signal to the panel based on the first panel driving pulse signal supplied to the panel, and wirelessly transmit pen identification information through a built-in pen wireless communication unit.

The display device includes a touch sensing circuit that supplies a first panel driving pulse signal to the panel and outputs raw data read from the panel from which the pen pulse signal is emitted, and the pen identification information wirelessly transmitted from the active pen. It may include a wireless communication module for receiving and outputting, and a touch controller for performing pen recognition processing based on raw data output from the touch sensing circuit and pen identification information output from the wireless communication module.

The pen pulse signal emitted from the active pen may not include pen identification information.

The pen pulse signal emitted from the active pen may include pen identification information.

The active pen may additionally wirelessly transmit pen data along with pen identification information through a built-in pen wireless communication unit.

1 is a diagram illustrating a touch sensing system according to the present embodiments.
2 is a diagram illustrating an operation mode of a display device according to the present exemplary embodiments.
3 is a block diagram of a display device according to the present embodiments.
4 is a configuration diagram of an active pen according to the present exemplary embodiment.
5 is a diagram illustrating a pen recognition process according to the present embodiments.
6 is a diagram illustrating a first panel driving pulse signal supplied to a panel, a pen pulse signal emitted from an active pen, and a read value obtained by reading a pen pulse signal from the touch sensing circuit in the touch sensing system according to the present embodiments; It is a diagram showing pen identification information according to the sign of the lead value.
7 is a diagram illustrating raw data obtained by reading a panel in the touch sensing circuit of the display device according to the present embodiments.
8 is a diagram illustrating display driving configurations in the case where the panel of the display device according to the present embodiments is a display panel having a built-in touch screen panel.
9 is a diagram illustrating an up-link and a down-link between the display device and the active pen according to the present embodiments.
10 is a diagram illustrating an operation period of the display device according to the present exemplary embodiments.
11 is a diagram illustrating three panel driving pulse signals supplied to a panel of a display device according to the present exemplary embodiment.
12A and 12B are diagrams exemplarily illustrating a touch process of a display device according to the present embodiments.
13 to 15 are diagrams illustrating a wireless communication method between an active pen and a display device according to the present exemplary embodiments.
16 is a flowchart of a pen recognition method according to the present embodiments.
17 is another diagram illustrating a pen recognition process according to the present embodiments.
18 is a diagram illustrating multi-pen recognition according to the present embodiments.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to components of each drawing, the same components may have the same reference numerals as much as possible even though they are indicated in different drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, order, or number of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but other components may be interposed between each component. It should be understood that each component may be “interposed” or “connected,” “coupled,” or “connected” through another component.

FIG. 1 is a diagram illustrating a touch sensing system according to example embodiments, and FIG. 2 is a diagram illustrating an operation mode of a display device 10 according to example embodiments.

The touch sensing system according to the present exemplary embodiments includes an active pen 20 and a display device 10 that interworks with the active pen 20 to perform pen recognition processing.

The display device 10 has a display mode for displaying an image and a touch sensing mode for touch gensing.

The display device 10 operates in a touch sensing mode to sense a touch by a finger as well as sense a touch by the active pen 20 .

The display device 10 may sense a touch by the active pen 20 in association with the active pen 20 .

The active pen 20 is a pen that includes electrical components and performs an active operation that interworks with the display device 10 in relation to touch sensing.

In addition to the touch sensing by the active pen 20 , the display device 10 senses a touch by a passive pen in which only a capacitor is formed in the same way as a finger without an operation actively interworking with the display device 10 . You may. However, a touch by a passive pen is processed in the same way as a touch by a finger. Accordingly, in this specification, a touch by a finger includes a touch by a passive pen.

The present embodiments provide a pen recognition method in which the display device 10 can efficiently recognize the active pen 20 and the display device 10 can simultaneously recognize a plurality of active pens 20 .

In the present embodiments, the active pen 20 provides pen identification information to the display device 10 through a predetermined path (at least one of a wireless communication path and a path through the panel), so that rapid and accurate pen recognition is possible. Not only that, it is possible to distinguish and recognize a plurality of active pens 20 to simultaneously process pen input through the plurality of active pens 20 .

First, embodiments in which the active pen 20 provides pen identification information to the display device 10 in the form of signal radiation through a panel will be described.

The display device 10 supplies a first panel driving pulse signal to the panel 310 . Accordingly, the active pen 20 transmits the pen pulse signal PENS representing the pen identification information to the display device 10 through the pen tip 410 based on the first panel driving pulse signal supplied to the panel 310 . radiate with a panel of

Also, the active pen 20 wirelessly transmits pen data to the display device 10 . In this case, the active pen 20 wirelessly transmits the pen identification information to the display device 10 .

The display device 10 generates raw data read from the panel from which the pen pulse signal is emitted.

The display device 10 receives pen data wirelessly transmitted from the active pen 20 .

The display device 10 may obtain pen identification information from the generated raw data, and perform pen recognition processing based on the acquired pen identification information and the wirelessly received pen data.

Pen recognition according to the present embodiments may mean that the display device 10 recognizes the fact that the active pen 20 exists (ie, the fact that a touch is generated by the active pen 20 ), and the display device (10) may further mean recognizing pen identification information of the active pen 20 .

In addition, pen recognition according to the present exemplary embodiments means that the display device 10 recognizes the active pen 20 means that the display device 10 detects a position (pen position) of a touch by the active pen 20 . It could mean more

In addition, in pen recognition according to the present exemplary embodiments, recognizing the active pen 20 by the display device 10 may further mean recognizing pen additional information such as pen pressure or inclination of the active pen 20 . .

Meanwhile, the display device 10 according to the present exemplary embodiments may sense a touch as a touch when a finger or the active pen 20 contacts the panel, and even if the finger or the active pen 20 does not contact the panel, a certain level If it is close to the following, it can be sensed by touch. That is, the display device 10 according to the present exemplary embodiments may provide both a contact-type touch sensing and a non-contact touch sensing (hover-type touch sensing).

Hereinafter, the pen recognition method according to the present embodiments will be described in detail.

3 is a block diagram of the display device 10 according to the present embodiments.

Referring to FIG. 3 , the display device 10 according to the present embodiments is a device that performs pen recognition processing in conjunction with the active pen 20 , and includes a panel 310 , a touch sensing circuit 320 , and a touch controller ( 330) and a wireless communication module 300, and the like.

A plurality of touch electrodes TE may be disposed on the panel 310 , and a plurality of touch lines TL may be disposed to electrically connect the plurality of touch electrodes TE and the touch sensing circuit 310 .

The touch sensing circuit 310 supplies the first panel driving pulse signal LFD to all or part of the plurality of touch electrodes TE disposed on the panel 310 , and read values read through each touch electrode TE. It generates raw data including (Read Value) (Raw Data, also called sensing data).

The touch sensing circuit 310 includes, for example, a pre-amplifier that receives the first panel driving pulse signal LFD and supplies it to the panel 310 and receives and outputs the signal from the panel 310 ; , at least one sensing unit including an integrator that integrates and outputs the signal output from the preamplifier, and reads the signal output from the integrator in at least one sensing unit to a digital value. It may include an analog-to-digital converter that outputs.

In addition, a multiplexer circuit for selectively electrically connecting at least one sensing unit and a plurality of touch lines TL disposed on the panel 310 may be further included. In addition, it may further include a multiplexer circuit for selectively electrically connecting the at least one sensing unit and the analog-to-digital converter.

Here, the read value read through each touch electrode TE includes information corresponding to a capacitance formed between each touch electrode TE and the active pen 20 or information corresponding to its change, or It may include information corresponding to a capacitance formed between the fingers or a change thereof.

Such a lead value may be different for each touch electrode TE. That is, the size of the read value may vary depending on how close the touch electrode TE is to the finger or the active pen 20 .

Raw data (including read values) generated by the touch sensing circuit 310 may be transmitted to the touch controller 330 through an interface between the touch sensing circuit 310 and the touch controller 330 . Here, the interface between the touch sensing circuit 310 and the touch controller 330 may be, for example, a Serial Peripheral Interface (SPI).

The touch controller 330 may sense the presence or absence of a touch by the finger or the active pen 20 or the touch position by using the raw data generated by the touch sensing circuit 310 .

The wireless communication module 300, as a configuration for wireless communication with the active pen 20, Bluetooth (Bluetooth), NFC (Near Field Communication), RFID (Radio-Frequency Identification), direct Wi-Fi (Direct Wi-Fi), etc. It may be a wireless communication module such as a short-range wireless communication module using The wireless communication module 300 may be a communication module that enables small size and low power.

4 is a configuration diagram of the active pen 20 according to the present exemplary embodiments.

Referring to FIG. 4 , the active pen 20 according to the present exemplary embodiments transmits a signal through the pen tip 410 in contact with or close to the panel 310 of the display device 10 and the pen tip 410 . An analog front-end receiver (AFE RX, 420) for receiving, an analog front-end transmitter (AFE TX, 430) that radiates a signal through the pen tip 410, and a pen wireless communication unit (400) that wirelessly transmits a signal; It may include a battery 450 and a pen controller 440 that generates signals, controls signal transmission/reception, and controls overall functions.

The pen wireless communication unit 400 is a configuration for wireless communication with the wireless communication module 300 of the display device 10, Bluetooth (Bluetooth), NFC (Near Field Communication), RFID (Radio-Frequency Identification), direct Wi-Fi ( It may be a short-range wireless communication module using Direct Wi-Fi, or the like, or a wireless communication module such as Wi-Fi, and may further include a mobile communication module such as Long Term Evolution (LTE).

Hereinafter, a pen recognition method in which the display device 10 can efficiently recognize the active pen 20 by interworking with the active pen 20 will be described.

5 is a diagram illustrating a pen recognition process according to the present embodiments.

6 illustrates a first panel driving pulse signal LFD supplied to the panel 310, a pen pulse signal PENS emitted from the active pen 20, and touch sensing in the touch sensing system according to the present embodiments. It is a diagram illustrating a read value read from the pen pulse signal PENS in the circuit 320 and pen identification information according to a sign of the read value.

7 is a diagram illustrating raw data obtained by reading the panel 310 in the touch sensing circuit 320 of the display device 10 according to the present exemplary embodiments.

The touch sensing circuit 320 supplies the first panel driving pulse signal LFD to the panel 310 . Accordingly, the analog front-end receiver 420 of the active pen 20 receives the first panel driving pulse signal LFD supplied to the panel 310 through the pen tip 410 ( S10 ).

The analog front-end transmitter 430 of the active pen 20 transmits the pen pulse signal PENS representing the pen identification information Pen ID based on the first panel driving pulse signal LFD through the pen tip 410 . It radiates to the panel 310 (S20-1).

Also, the pen wireless communication unit 400 of the active pen 20 may wirelessly transmit pen data including one or more pen-related additional information (S20-2).

The touch sensing circuit 320 generates raw data including read values read through the panel 310 with the pen pulse signal PENS radiated to the panel 310 and expressing pen identification information to touch the touch sensor. It can output to the controller 330 (S30-1).

The wireless communication module 300 may receive pen data wirelessly transmitted from the active pen 20 and output it to the touch controller 330 (S30-2).

The touch controller 330 acquires pen identification information (Pen ID) from the raw data output from the touch sensing circuit 320 , and recognizes the pen based on the acquired pen identification information and the pen data output from the wireless communication module 300 . processing may be performed (S40).

More specifically, the touch controller 330 obtains pen identification information (Pen ID) from the raw data output from the touch sensing circuit 320 through pen recognition processing, and an active pen corresponding to the obtained pen identification information. The touch position (pen position) of 20 may be sensed.

Also, the touch controller 330 may further recognize additional pen information on the active pen 20 using pen data output from the wireless communication module 300 through pen recognition processing.

Here, the pen data may include, for example, one or more pen additional information among pen pressure, pen tilt, control information, and button input information.

Also, the touch controller 330 may sense the touch position (finger position) of the finger using the raw data output from the touch sensing circuit 320 .

As described above, the display device 10 obtains the base pen identification information to the active pen 10 through the panel 310 and obtains the base pen data to the active pen 10 through a wireless communication path. That is, the display device 10 may acquire information (pen identification information, pen data) necessary for pen recognition through two paths.

Accordingly, the active pen 20 may divide pen data and pen identification information, which may have a large data capacity, into two different paths and transmit them to the display device 10 . Accordingly, the display device 10 can more quickly and accurately acquire information necessary for the pen recognition process (pen additional information and pen identification information in the pen data), so that the pen recognition process can be performed quickly and accurately. .

In addition, since the active pen 20 transmits pen identification information to the display device 10 , the display device 10 can distinguish a plurality of active pens 20 , thereby providing multi-pen recognition. .

Referring to FIG. 5 , the active pen 20 wirelessly transmits pen identification information (Pen ID) in addition to pen data including one or more of pen pressure, pen tilt and control information, through the pen wireless communication unit 400 . It can be transmitted (S20-2).

Accordingly, the wireless communication module 300 of the display device 10 receives the pen identification information and the pen data and outputs it to the touch controller 330 (S30-2).

The touch controller 330 may perform pen recognition processing using the raw data output from the touch sensing circuit 320 , the pen data output from the wireless communication module 300 , and pen identification information ( S40 ).

As described above, the pen identification information (Pen ID) is transmitted to the touch controller 330 through the panel 310 and is also transmitted to the touch controller 330 through a wireless transmission method. That is, the touch controller 330 can obtain the pen identification information (Pen ID) through two paths.

As described above, as the active pen 20 divides pen identification information important for pen recognition (especially, multi-pen recognition) into two different paths and transmits it to the display device 10 , the touch controller 330 generates the multi-pen Pen identification information, which is important information enabling recognition, can be reliably obtained. Accordingly, the display device 10 may more accurately recognize the active pen 20 , accurately distinguish two or more active pens 20 , and simultaneously provide pen recognition processing. Accordingly, the user may touch, write, or input by using two or more active pens 20 at the same time.

Referring to FIG. 6 , the first panel driving pulse signal LFD is a signal for driving the panel 310 in order to sense a touch by a finger or the active pen 20 , and the touch sensing circuit 320 operates the panel ( 310).

The first panel driving pulse signal LFD may include a plurality of panel driving pulses A, B, C, D, E, F, G, and H.

The active pen 20 receives the first panel driving pulse signal LFD supplied to the panel 310 through the pen tip 410 . Based on this, a pen pulse signal PENS is generated.

The pen pulse signal PENS is a signal that enables the display device 10 to recognize the active pen 20 , and is a signal radiated from the active pen 20 to the panel 310 of the display device 10 .

The active pen 20 generates a pen pulse signal PENS by using the first panel driving pulse signal LFD.

The pen pulse signal PENS includes a plurality of digital codes (eg, 0, 0, 0, 1, 0, 0, 1, 1) corresponding to the pen identification information based on the first panel driving pulse signal LFD. It may include a plurality of pen pulses (PA, PB, PC, PD, PE, PF, PG, PH) representing

The plurality of pen pulses PA, PB, PC, PD, PE, PF, PG, PH included in the pen pulse signal PENS is a first pen pulse (eg, 0 or 1) representing a first digital code (eg, 0 or 1). Examples: PA, PB, PC, PE, PF) and a second pen pulse (eg, PD, PG, PH) representing a second digital code (eg, 1 or 0).

The first pen pulse (eg, PA, PB, PC, PE, PF) includes a plurality of panel driving pulses A, B, C, D, E, F, G included in the first panel driving pulse signal LFD. , H) is pulsed at the rising time of the corresponding panel driving pulses (eg, A, B, C, E, F).

The second pen pulse (eg, PD, PG, PH) is one of the plurality of panel driving pulses A, B, C, D, E, F, G, H included in the first panel driving pulse signal LFD. It may be pulsed at the Falling Time of the corresponding panel driving pulses (eg, D, G, H).

As described above, since the active pen 20 generates a pen pulse signal PENS representing the pen identification information PID based on the first panel driving pulse signal LFD and radiates it to the panel 310 , the display The device 10 may accurately read the pen pulse signal PENS and accurately recognize the pen identification information PID indicated by the pen pulse signal PENS.

6 and 7, the raw data read from the panel 310 by the touch sensing circuit 320 is -N (N is a preset positive real number) or more and +P ( P may include a plurality of read values (eg, RA, RB, RC, RD, RE, RF, RG, RH) having real values included in a range less than or equal to a preset positive real number.

The plurality of read values are: a first read value (eg RA, RB, RC, RE, RF) for a first pen pulse (eg PA, PB, PC, PE, PF) and a second pen pulse (eg, RA, RB, RC, RE, RF) PD, PG, PH), including the second read value (eg RD, RG, RH), the sign of the first read value (eg RA, RB, RC, RE, RF) and the second read value ( For example: RD, RG, RH) may have different signs.

For example, a plurality of panel driving pulses A, B, C, D, E, F, G, H included in the first panel driving pulse signal LFD and a plurality of panel driving pulses included in the pen pulse signal PENS If the phase relationship between the pen pulses (PA, PB, PC, PD, PE, PF, PG, PH) is positive, the corresponding first read value (eg RA, RB, RC, RE, RF) is negative (- ) has a real value.

In this case, the touch controller 330 may interpret the corresponding first read values (eg, RA, RB, RC, RE, RF) having a negative (-) real value as a first digital code (eg, 0). have.

A plurality of panel driving pulses A, B, C, D, E, F, G, H included in the first panel driving pulse signal LFD and a plurality of pen pulses PA included in the pen pulse signal PENS , PB, PC, PD, PE, PF, PG, and PH) are out of phase, the corresponding second read value (eg, RD, RG, RH) has a positive (+) real value.

In this case, the touch controller 330 may interpret the corresponding second read values (eg, RD, RG, and RH) having a positive (+) real value as a second digital code (eg, 1).

Accordingly, the touch controller 330 includes a plurality of read values (eg, RA, RB, RC, RD, RE, A plurality of digital codes (eg, 00010011) may be determined based on each sign (RF, RG, RH), and pen identification information (PID) including the determined plurality of digital codes (eg, 00010011) may be obtained. .

As described above, read values (eg, RA, RB, RC, RD, RE, RF, RG, RH) included in the raw data read from the panel 310 by the touch sensing circuit 320 . The pen identification information (PID) of the active pen 20 can be easily and accurately obtained using the .

Meanwhile, as shown in FIG. 7 , the raw data read from the panel 310 by the touch sensing circuit 320 is -N (N is a preset positive real number) or more and +P (P is a preset amount) ) may include a plurality of read values (eg, RA, RB, RC, RD, RE, RF, RG, RH) having real values included in the following ranges.

For example, raw data may include multiple read values (eg, RA, RB, RC, RD, RE, RF, RG, RH) with real values falling within the range of -1 or greater and +1 or less. can

The touch controller 330, based on the distribution of all or a part of a plurality of read values (eg, RA, RB, RC, RD, RE, RF, RG, RH) in the panel 310, the active pen 20 or The position or presence of a finger can be detected.

That is, the touch controller 330 calculates a distribution of read values having a real value (ie, a size distribution of read values for each panel position) based on the received and collected raw data, and a read value at a specific position based on the calculated distribution. If they have significantly different distributions, the specific location may be detected as the presence or absence of touch by the finger or the active pen 20 and/or the location of the touch.

As described above, the touch controller 330 acquires the pen identification information PID of the active pen 20 by using the raw data read from the panel 310 by the touch sensing circuit 320 . In addition, the touch position by the active pen 20 may be sensed, and in some cases, the presence/absence of touch by a finger and/or the touch position may also be sensed.

The panel 310 of the display device 10 according to the present embodiments may be a dedicated touch screen panel for touch sensing, or in some cases, a display panel serving as a touch screen panel.

8 is a diagram illustrating display driving configurations in the case where the panel 310 of the display device 10 according to the present embodiments is a display panel having a built-in touch screen panel.

Referring to FIG. 8 , when the panel 310 of the display device 10 according to the present embodiments is a display panel having a built-in touch screen panel, the panel 310 is disposed in a first direction (eg, a column direction). A plurality of data lines DL to be used, a plurality of gate lines GL disposed in a second direction (eg, a row direction), and a plurality of touch electrodes TE for touch sensing may be disposed. Here, the fact that the panel 310 has a built-in touch screen panel means that a plurality of touch electrodes TE are embedded in the panel 310 .

Referring to FIG. 8 , the display device 10 according to the present exemplary embodiments includes a data driving circuit 810 for driving a plurality of data lines DL and a gate for driving the plurality of gate lines GL. A driving circuit 820 may be included.

The display device 10 according to the present exemplary embodiments may further include a control configuration such as a timing controller for controlling the data driving circuit 810 and the gate driving circuit 820 .

The data driving circuit 810 and the touch sensing circuit 320 may be integrated and implemented as one integrated circuit.

In addition, two or more of the data driving circuit 810 , the gate driving circuit 820 , the timing controller, the touch sensing circuit 320 , and the touch controller 330 may be integrated and implemented as one integrated circuit.

9 is a diagram illustrating an up-link and a down-link between the display device 10 and the active pen 20 according to the present embodiments.

Referring to FIG. 9 , the display device 10 and the active pen 20 according to the present exemplary embodiments transmit and receive signals for pen recognition.

When a signal (including all data, information, etc.) is transmitted from the display device 10 to the active pen 20 , it indicates that an Up-Link exists between the display device 10 and the active pen 20 . do.

When a signal (including all data, information, etc.) is transmitted from the active pen 20 to the display device 10 , it indicates that a down-link exists between the display device 10 and the active pen 20 . do.

10 is a diagram illustrating an operation period of the display device 10 according to the present embodiments, and FIG. 11 is three panel driving pulse signals supplied to the panel 310 of the display device 10 according to the present embodiments. is a diagram showing

Referring to FIG. 10 , the operation period of the display device 10 may include a display driving period and a touch driving period.

In other words, the display device 10 may proceed while alternately driving the display and driving the touch.

In addition, the touch driving period may correspond to a blank time between two display driving periods.

The panel driving state is examined in the display driving section and the touch driving section.

During the display driving period, in the panel 310 , the image data signal is applied to the plurality of data lines DL and the gate signal is applied to the plurality of gate lines GL.

The touch driving section corresponding to the blank section between the two display driving sections includes an up-link transmission section ULNK for transmitting a signal from the display device 10 to the active pen 20 and a display in the active pen 20 . It may include a down-link transmission interval (DLNK) for signal transmission to the device 10 .

During the down-link transmission period DLNK, the first panel driving pulse signal LFD may be applied to all or part of the plurality of touch electrodes TE in the panel 310 .

During the uplink transmission period ULNK, the second panel driving pulse signal BCON or the third panel driving pulse signal PNG may be applied to all or part of the plurality of touch electrodes TE in the panel 310 . have.

Here, the second panel driving pulse signal BCON or the third panel driving pulse signal PNG is a signal distinct from the first panel driving pulse signal LFD.

Meanwhile, signal transmission/reception between the display device 10 and the active pen 20 in each of the up-link transmission section ULNK and the down-link transmission section DLNK in which the touch driving section is divided will be described below.

During the down-link transmission period DLNK, the panel state is a state in which the first panel driving pulse signal LFD is supplied to the panel 310 . Accordingly, the first panel driving pulse signal LFD supplied to the panel 310 is input to the active pen 20 .

During this down-link transmission period DLNK, a pen pulse signal PENS indicating pen identification information is emitted from the active pen 20 to the panel 310 .

Also, during the down-link transmission period DLNK, pen identification information and pen data are wirelessly transmitted from the active pen 20 to the wireless communication module 300 .

Accordingly, during the down-link transmission period (DLNK), a finger location (FLOC) touched by a finger can be detected, and a pen location (PLOC: Pen Location) touched by the active pen 20 can be detected. ) may be detected, and pen identification information (PID) of the active pen 20 may be detected.

During the uplink transmission period ULNK, the panel state is a state in which the second panel driving pulse signal BCON or the third panel driving pulse is supplied to the panel 310 .

Accordingly, the second panel driving pulse signal BCON or the third panel driving pulse supplied to the panel 310 may be input from the panel 310 to the active pen 20 .

The second panel driving pulse signal BCON or the third panel driving pulse supplied to the panel 310 and transmitted to the active pen 20 during the up-link transmission period ULNK is, during the down-link transmission period DLNK, It may be distinguished from the first panel driving pulse signal LFD supplied to the panel 310 and transmitted to the active pen 20 .

As described above, the touch driving section is divided into an up-link transmission section (ULNK) and a down-link transmission section (DLNK), and the pen for each of the up-link transmission section (ULNK) and the down-link transmission section (DLNK) It can make an appropriate panel driving state necessary for recognition. Through this, efficient and accurate signal transmission/reception for pen recognition may be enabled, and ultimately accurate and efficient pen recognition may be enabled.

Referring to FIG. 11 , as described above, three types of panel driving pulse signals LFD, BCON, and PNG may be supplied to the panel 310 for touch sensing (finger sensing, pen sensing).

First, the first panel driving pulse signal LFD is a signal that is supplied to the panel 310 and transmitted to the active pen 20 during the down-link transmission period DLNK, and is a high-level period HL and a low-level period. (LL) is a signal with an alternating periodic pattern.

The active pen 20 may generate a pen pulse signal PENS indicating pen identification information according to the pulsing timing of the first panel driving pulse signal LFD and radiate the generated pen pulse signal PENS to the panel 310 .

The first panel driving pulse signal LFD only swings while alternating between the high level section HL and the low level section LL, and no meaningful information is loaded.

In contrast, the second panel driving pulse signal BCON and the third panel driving pulse signal PNG are signals carrying meaningful information.

The second panel driving pulse signal BCON is a signal that is supplied to the panel 310 and transmitted to the active pen 20 during the up-link transmission period ULNK, and may be a beacon signal carrying panel information.

By receiving the second panel driving pulse signal BCON corresponding to the beacon signal, the active pen 20 may recognize that the panel 310 is adjacent to each other, and display the recognized panel information of the panel 310 . can find out

Here, the panel information may include panel identification information, panel resolution, panel manufacturer, and the like.

The third panel driving pulse signal PNG is a signal that is supplied to the panel 310 and transmitted to the active pen 20 during the up-link transmission period ULNK, and may be a ping signal carrying touch driving period information. have.

The active pen 20 is. By receiving the third panel driving pulse signal PNG corresponding to the ping signal, the operation may be synchronized with the driving operation of the display device 10 or the panel 310 .

The active pen 20 detects, through the third panel driving pulse signal PNG corresponding to the ping signal, what frame the display device 10 drives, and how many touch driving sections within the frame are in progress. can recognize

That is, the third panel driving pulse signal PNG may temporally synchronize an operation between the display device 10 and the active pen 20 .

The above-mentioned first panel driving pulse signal LFD, second panel driving pulse signal BCON, and third panel driving pulse signal PNG are different signals.

As described above, by differentiating and applying a panel driving pulse signal suitable for each timing for touch sensing (finger sensing, pen sensing), touch sensing can be accurately performed.

Meanwhile, the three types of panel driving pulse signals LFD, BCON, and PNG may be basically supplied to all or a part of the plurality of touch electrodes TE disposed on the panel 310 .

In this case, an unnecessary parasitic capacitor may be formed between the other electrodes in the panel 310 and the touch electrode TE.

Such a parasitic capacitor may cause a resistor-capacitor (RC) delay with respect to the touch electrode TE, and may be a factor of lowering sensing accuracy during capacitance-based touch sensing.

Accordingly, during the down-link transmission period DLNK within the touch driving period, a signal corresponding to the first panel driving pulse signal LFD may be applied to all or part of the plurality of data lines DL.

Also, during the down-link transmission period DLNK within the touch driving period, a signal corresponding to the first panel driving pulse signal LFD may be applied to all or part of the plurality of gate lines GL.

Here, the signal corresponding to the first panel driving pulse signal LFD may be completely the same or substantially the same as the first panel driving pulse signal LFD in frequency, amplitude, phase, and other signal characteristics. .

Meanwhile, a signal corresponding to the first panel driving pulse signal LFD is completely identical to or substantially the same as the first panel driving pulse signal LFD in at least one of frequency, amplitude, phase, and other signal characteristics. It could be a signal.

Here, "substantially identical" means that the two values are not completely identical, but can be regarded as identical if the difference is within a predetermined tolerance margin or a measurement error range. For example, the tolerance margin or measurement error range may be ±20%, ±10%, ±5%, ±1%, and the like.

As described above, in the down-link transmission section (DLNK) within the touch driving section, in a state in which the effect of the parasitic capacitor is removed or substantially removed, a finger location (FLOC: Finger Location) where a touch is made by a finger is accurately detected A pen location (PLOC) at which a touch is made by the active pen 20 may be accurately detected, and pen identification information (PID) of the active pen 20 may be accurately detected.

Here, the practical removal of the parasitic capacitor is, even if the parasitic capacitor is not completely removed, the degree of change in touch sensing accuracy by the parasitic capacitor is within a predefined tolerance range (eg, ±20%, ±10%, ±5%, ±1%), it means that the parasitic capacitor is removed.

Meanwhile, during the up-link transmission period ULNK within the touch driving period, while the second panel driving pulse signal BCON is supplied to the panel 310 , the second panel is driven in whole or in part by the plurality of data lines DL. A signal corresponding to the pulse signal BCON may be applied.

In addition, during the up-link transmission period ULNK within the touch driving period, while the second panel driving pulse signal BCON is supplied to the panel 310 , the second panel is driven by all or a part of the plurality of gate lines GL A signal corresponding to the pulse signal BCON may be applied.

In addition, during the up-link transmission period ULNK within the touch driving period, while the third panel driving pulse signal PNG is supplied to the panel 310 , the third panel is driven by all or a part of the plurality of data lines DL A signal corresponding to the pulse signal PNG may be applied.

In addition, during the up-link transmission period ULNK within the touch driving period, while the third panel driving pulse signal PNG is supplied to the panel 310 , the third panel is driven by all or part of the plurality of gate lines GL A signal corresponding to the pulse signal PNG may be applied.

Here, the signal corresponding to the second panel driving pulse signal BCON or the third panel driving pulse signal PNG is the second panel driving pulse signal BCON or the signal corresponding to the frequency, amplitude, phase and other signal characteristics. The third panel driving pulse signal PNG may be completely or substantially the same as the signal.

Meanwhile, the signal corresponding to the second panel driving pulse signal BCON or the third panel driving pulse signal PNG has at least one of frequency, amplitude, phase, and other signal characteristics, the second panel driving pulse signal ( BCON) or the third panel driving pulse signal PNG may be the same or substantially the same signal.

Here, "substantially identical" means that the two values are not completely identical, but can be regarded as identical if the difference is within a predetermined tolerance margin or a measurement error range. For example, the tolerance margin or measurement error range may be ±20%, ±10%, ±5%, ±1%, and the like.

Meanwhile, the display device 10 according to the present exemplary embodiments may proceed with one display driving period during one frame (display frame) period.

In this case, one frame period may include one display driving period and one touch driving period.

Alternatively, the display device 10 according to the present exemplary embodiments may perform two or more display driving periods during one frame period.

In this case, one frame section may include two or more display driving sections and one or more touch driving sections.

12A and 12B are diagrams exemplarily illustrating a touch process of the display device 10 according to the present embodiments.

Referring to FIG. 12A , for example, the display device 10 separates and proceeds 16 display driving periods D1, D2, ... , D16 during one frame period, and A touch driving section may be performed for each blank section 1 to 16 corresponding therebetween.

Accordingly, one frame section is time-divided into 16 display driving sections (D1, D2, ... , D16) and 16 touch driving sections (T1, T2, ... , T16), and display driving and touch driving This can be done alternately.

12B is a diagram illustrating a touch sensing process for each of the 16 touch driving sections T1, T2, ..., T16 in FIG. 12A.

12B, each of the 16 touch driving sections T1, T2, ..., T16 corresponding to the 16 blank sections 1, 2, ..., 16 is an up-link transmission section (ULNK) and a down-link transmission interval (DLNK).

Referring to FIG. 12B , as described above, during the down-link transmission period DLNK, the first panel driving pulse signal LFD is supplied to the panel 310, the finger position FLOC is sensed, and the pen position (PLOC) is detected, and pen identification information (PID) is recognized.

Referring to FIG. 12B , as described above, during the up-link transmission period ULNK of all or part of the 16 up-link transmission periods ULNK, the second panel driving pulse signal BCON is transmitted to the panel 310 . can be supplied.

For example, during the first up-link transmission interval (ULNK) and the middle up-link transmission interval (ULNK, that is, the 8th up-link transmission interval) of the 16 up-link transmission interval (ULNK), the second The panel driving pulse signal BCON may be supplied to the panel 310 .

Referring to FIG. 12B , as described above, during the up-link transmission period (ULNK) of all or part of the 16 up-link transmission periods (ULNK), the panel 310 includes a third panel driving pulse signal (PNG). can be supplied.

For example, during an up-link transmission period in which the second panel driving pulse signal BCON is supplied to the panel 310 among 16 up-link transmission periods ULNK, the third panel driving pulse signal PNG is transmitted to the panel 310 may be supplied.

As described above, the active pen 20 includes a pen wireless communication unit 400 that wirelessly transmits pen data and pen identification information, and the display device 10 includes a wireless communication module ( 300) is included.

The pen wireless communication unit 400 of the active pen 20 and the wireless communication module 300 of the display device 10 are, for example, Bluetooth, Near Field Communication (NFC), Radio-Frequency Identification (RFID), A short-distance wireless communication module using direct Wi-Fi or the like, or a wireless communication method such as Wi-Fi or LTE (Long Term Evolution) may communicate.

The pen wireless communication unit 400 of the active pen 20 and the wireless communication module 300 of the display device 10 include Bluetooth, Near Field Communication (NFC), Radio-Frequency Identification (RFID), or Direct Wi-Fi. -Fi), or the like, without an access point, it is possible to detect the other party and establish a mutual connection through a pairing operation.

When the pen wireless communication unit 400 of the active pen 20 and the wireless communication module 300 of the display device 10 communicate using a wireless communication method such as Wi-Fi or Long Term Evolution (LTE), Through an access point such as a router or a base station, it is possible to detect a counterpart and establish a mutual connection.

Accordingly, the active pen 20 and the display device 10 may provide a user interface for establishing a mutual connection.

13 to 15 are diagrams illustrating a wireless communication method between the active pen 20 and the display device 10 according to the present embodiments.

During wireless communication between the pen wireless communication unit 400 of the active pen 20 and the wireless communication module 300 of the display device 10, a spread spectrum technique to enhance signal interference due to noise, security, etc. can be used to transmit and receive signals.

That is, the pen wireless communication unit 400 of the active pen 20 uses a Pseudo Noise (PN) code (Y) to spectrum the signal X including pen data and pen identification information to be transmitted. The spread and the spectrum-spread signal Z may be wirelessly transmitted to the wireless communication module 300 of the display device 10 .

More specifically, the pen wireless communication unit 400 of the active pen 20, for example, primary modulates the pen data and pen identification information to be sent in a PSK (Phase Shift Keying) method, and then the primary modulated signal ( X) is secondarily modulated using the pseudo noise (PN) code (Y) generated by the PN generator, and the second modulated signal ( Z) is converted into an analog signal and transmitted wirelessly through an antenna.

Here, the secondary modulated signal Z may be generated by an exclusive OR of the primary modulated signal X and the pseudo noise code Y. As shown in FIG.

In addition, the pseudo-noise code generator (PN) generates a pseudo-noise code Y composed of a plurality of bit strings using a chip clock having a chip clock period Tc.

The pseudo-noise code Y used in the pen wireless communication unit 400 of the active pen 20 is equally used in demodulation in the wireless communication module 300 of the display device 10 .

The wireless communication module 300 of the display device 10 may demodulate inversely to the method modulated by the pen wireless communication unit 400 of the active pen 20 .

The wireless communication module 300 of the display device 10 converts a signal wirelessly received from the pen wireless communication unit 400 of the active pen 20 into a digital signal through an analog to digital converter, The converted digital signal (Z) is first demodulated using the pseudo noise code (Y) generated by the pseudo noise code generator (PN Generator), and the first demodulated signal (X) is subjected to PSK (Phase Shift Keying) demodulation process Through this process, pen data and pen identification information that the active pen 20 intends to send are obtained.

Here, the primary demodulated signal (X) may be generated by the exclusive OR (Exclusive Or) of the digital signal (Z) converted from the received signal and the pseudo noise code (Y).

In addition, the pseudo noise code generator (PN Generator) in the wireless communication module 300 of the display device 10 is the same pseudo noise code (Y) used in the pen wireless communication unit 400 of the active pen 20 . Generate code (Y).

Meanwhile, a spread spectrum technique used in wireless communication between the pen wireless communication unit 400 of the active pen 20 and the wireless communication module 300 of the display device 10 is, for example, a direct sequence spread spectrum. It may be a Direct Sequence Spread Spectrum (DSSS) technique, a Frequency Hopping Spread Spectrum (FHSS) technique, or a Time Hopping Spread Spectrum (THSS) technique.

In addition, during wireless communication between the pen wireless communication unit 400 of the active pen 20 and the wireless communication module 300 of the display device 10, the time of the information signal does not depend on the pseudo-noise code for spectrum spreading. It is also possible to use a chirp modulation technique, which is a spread spectrum technique that changes the carrier frequency using a linear frequency characteristic during a change period of .

As described above, the pen wireless communication unit 400 of the active pen 20 and the wireless communication module 300 of the display device 10 are not affected by noise and can accurately transmit and receive signals carrying information to be transmitted. It can also enhance the security of information. Accordingly, more accurate pen recognition may be achieved.

16 is a flowchart of a pen recognition method according to the present embodiments.

Referring to FIG. 16 , in the pen recognition method according to the present embodiments, the pen recognition method through interworking with the active pen 20 of the display device 10 is performed by the display device 10 using the panel 310 . 1 step of supplying a panel driving pulse signal LFD (S1610), and the active pen 20 transmits a pen pulse signal PENS indicating pen identification information based on the first panel driving pulse signal LFD to the pen tip ( A second step (S1620) of radiating to the panel 310 through 410 and wirelessly transmitting pen data, and a row generated by the display device 10 reading from the panel 310 to which the pen pulse signal PENS is emitted A third step (S1630) of performing pen recognition processing based on raw data and pen data wirelessly transmitted from the active pen 20 may be included.

Using the above-described pen recognition method, the display device 10 acquires the base pen identification information to the active pen 10 through the panel 310 and transmits the base pen data to the active pen 10 through a wireless communication path. acquire That is, the display device 10 may acquire information (pen identification information, pen data) necessary for pen recognition through two paths (a panel and a wireless communication path).

Accordingly, the active pen 20 may divide pen data and pen identification information, which may have a large data capacity, into two different paths and transmit them to the display device 10 . Accordingly, the display device 10 can more quickly and accurately acquire information necessary for the pen recognition process (pen additional information and pen identification information in the pen data), so that the pen recognition process can be performed quickly and accurately. .

In addition, since the active pen 20 transmits pen identification information to the display device 10 , the display device 10 can distinguish a plurality of active pens 20 , thereby providing multi-pen recognition. .

In step S1620 , the active pen 20 may wirelessly transmit pen identification information in addition to the pen data.

Accordingly, the active pen 20 may transmit pen identification information important for pen recognition (particularly, multi-pen recognition) to the display device 10 by dividing it into two different paths. Accordingly, the display device 10 may more accurately recognize the active pen 20 , accurately distinguish two or more active pens 20 , and simultaneously provide pen recognition processing. Accordingly, the user may touch, write, or input by using two or more active pens 20 at the same time.

17 is another diagram illustrating a pen recognition process according to the present embodiments.

The pen recognition process illustrated in FIG. 17 is almost similar to the pen recognition process of FIG. 5 .

However, the basic principle is that the active pen 20 provides the pen identification information (Pen ID) to the touch controller 330 of the display device 10 in a wireless transmission method, and the pen identification information (Pen ID) is provided to the panel 310 . It may be optional to provide to the touch controller 330 of the display device 10 through the .

In step S10 , the touch sensing circuit 320 of the display device 10 supplies the first panel driving pulse signal LFD to the panel 310 .

The active pen 20 emits a pen pulse signal PENS to the panel 310 based on the first panel driving pulse signal LFD supplied to the panel 310 (S20-1), and the built-in pen wireless Pen identification information (Pen ID) is wirelessly transmitted through the communication unit 400 (S20-2).

Here, the pen pulse signal PENS emitted from the active pen 20 may be synchronized and pulsed according to the pulsing of the first panel driving pulse signal LFD, but may not include the pen identification information Pen ID.

That is, the pen identification information is overlapped through two paths and is not provided to the display device 10 .

In this case, the active pen 20 may easily generate the pen pulse signal PENS based on the first panel driving pulse signal LFD supplied to the panel 310 .

Alternatively, the pen pulse signal PENS emitted from the active pen 20 may selectively include pen identification information Pen ID as shown in FIG. 6 .

When the touch sensing circuit 320 of the display device 10 supplies the first panel driving pulse signal LFD to the panel 310 , raw data read from the panel 310 from which the pen pulse signal PENS is emitted. (Raw Data) is output to the touch controller 330 (S30-1).

The wireless communication module 300 of the display device 10 receives the pen identification information wirelessly transmitted from the active pen 20 and outputs it to the touch controller 330 (S30-2).

The touch controller 330 of the display device 10 may perform pen recognition processing based on raw data output from the touch sensing circuit 320 and pen identification information output from the wireless communication module 300 .

Meanwhile, the active pen 20 may optionally additionally transmit pen data wirelessly along with pen identification information through the built-in pen wireless communication unit 400 .

In this case, the display device 10 can know one or more pen additional information such as pen pressure, tilt, control information, and button input information for the active pen 20 from the pen data, so that the pen recognition process is performed more precisely. can do.

18 is a diagram illustrating multi-pen recognition according to the present embodiments.

Referring to FIG. 18 , two or more active pens 20 transmit pen identification information that is important for pen recognition (particularly, multi-pen recognition) to the display device 10 , so that the display device 10 can display the two or more active pens 20 . Pen identification information (eg: 00010011, 10000001) for the pen 20 may be managed as a list.

Then, the display device 10 associates the raw data and pen data (pen pressure, tilt, control information, button input information, etc.) for each active pen 20 with the corresponding pen identification information to perform pen recognition processing, The presence or absence of each of the two or more active pens 20 and the location of the touch may be accurately distinguished and detected.

Meanwhile, in the conventional pen recognition technology, a full scan process of sensing the entire area of the panel 310 to find the active pen 20 and a partial area in which the active pen 200 found in the panel 3100 exist Pen recognition may be performed through a local sensing process in which pen data is acquired by repeatedly sensing only the pen.

However, according to the pen recognition method according to the present embodiments described above, it is necessary to separately perform a full scan process to find the active pen 20 and a local sensing process to acquire pen data. Without it, through a full scan process, finding the active pen 20, detecting the presence and/or touch position of the active pen 20, and simultaneously detecting the presence and/or touch position of a finger can do.

In the case of the pen recognition method according to the present embodiments, the active pen 20 is found through a full scan process without a local sensing process, and whether or not the active pen 20 is touched and/or touched Since the position is sensed and the touch presence and/or touch position of the finger are simultaneously performed, the touch position of the finger or the active pen 20 can be accurately detected, and the motion tracking of the finger or the active pen 20 can be performed at the same time. It can be done more accurately.

In addition, the conventional pen recognition method cannot provide pen recognition processing (including position detection) for two or more active pens 20, but in the case of the pen recognition method according to the present embodiments, two or more active pens It is possible to simultaneously provide pen recognition processing (including position detection) for ( 20 ).

According to the embodiments described above, it is possible to provide a touch sensing system, the display device 10 , the active pen 20 , and a pen recognition method capable of quickly and accurately recognizing a pen.

In addition, according to the present exemplary embodiments, pen input through the plurality of active pens 20 by distinguishing and recognizing the plurality of active pens 20 and processing the pen data for the plurality of active pens 20 separately. It is possible to provide a touch sensing system, the display device 10 , the active pen 20 , and a pen recognition method capable of simultaneously processing .

In addition, according to the present embodiments, when transmitting and receiving a signal between the active pen 20 and the display device 10 for pen recognition, a touch sensing system and a display device ( 10), the active pen 20 and a pen recognition method may be provided.

In addition, according to the present embodiments, the touch sensing system, the display device 10, the active pen 20, and the pen recognition capable of simultaneously and accurately sensing a touch by a finger and a touch by the active pen 20 at the same time method can be provided.

The above description and the accompanying drawings are merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains can combine configurations within a range that does not depart from the essential characteristics of the present invention. , various modifications and variations such as separation, substitution and alteration will be possible. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

10: display device
20: active pen
300: wireless communication module
310: panel
320: touch sensing circuit
330: touch controller
400: pen wireless communication unit
410: pen tip
420: analog front-end receiver
430: analog front-end transmitter
440: pen controller

Claims (23)

In the touch sensing system,
active pen; and
A display device comprising a panel on which a plurality of touch electrodes are disposed, and performing pen recognition processing in conjunction with the active pen,
The active pen is
A pen pulse signal indicating pen identification information is radiated to the panel through a pen tip, and pen data is wirelessly transmitted through a built-in pen wireless communication unit,
The display device is
a touch sensing circuit for supplying a first panel driving pulse signal to the panel and outputting raw data read from the panel from which the pen pulse signal is emitted;
a wireless communication module for receiving and outputting the pen data wirelessly transmitted from the active pen;
and a touch controller configured to acquire pen identification information from the raw data output from the touch sensing circuit and perform pen recognition processing based on the acquired pen identification information and the pen data output from the wireless communication module; system. According to claim 1,
The active pen is
In addition to the pen data including at least one of pen pressure, pen tilt, and control information, the pen identification information is additionally transmitted wirelessly through the pen wireless communication unit,
the wireless communication module receives the pen identification information and the pen data and outputs the received pen data to the touch controller;
The touch controller is
A touch sensing system for performing pen recognition processing using the raw data output from the touch sensing circuit, the pen data output from the wireless communication module, and the pen identification information. According to claim 1,
The active pen is
receiving the first panel driving pulse signal including a plurality of panel driving pulses through the panel through the pen tip;
The touch sensing system radiates the pen pulse signal including a plurality of pen pulses indicating a plurality of digital codes corresponding to the pen identification information to the panel based on the first panel driving pulse signal. 4. The method of claim 3,
A plurality of pen pulses included in the pen pulse signal,
a first pen pulse representing a first digital code;
a second pen pulse representing a second digital code;
The first pen pulse is
is pulsed at a rising time of a corresponding panel driving pulse among the plurality of panel driving pulses,
The second pen pulse is
A touch sensing system that is pulsed at a falling time of a corresponding panel driving pulse among the plurality of panel driving pulses. 5. The method of claim 4,
The raw data read from the panel is,
contains multiple read values with real values falling within the range greater than or equal to -N (N is a preset positive real number) and less than or equal to +P (P is a preset positive real number);
The plurality of read values are
a first read value for the first pen pulse and a second read value for the second pen pulse;
A sign of the first read value and a sign of the second read value are different from each other. 6. The method of claim 5,
The touch controller is
determining a plurality of digital codes based on each sign of a plurality of read values included in the raw data output from the touch sensing circuit;
A touch sensing system for acquiring pen identification information including the determined plurality of digital codes. 5. The method of claim 4,
The raw data read from the panel is,
contains multiple read values with real values falling within the range greater than or equal to -N (N is a preset positive real number) and less than or equal to +P (P is a preset positive real number);
The touch controller is
A touch sensing system for detecting the position or presence of the active pen or the finger based on a distribution of all or a portion of the plurality of read values in the panel. According to claim 1,
The operation section of the display device includes a display driving section and a touch driving section,
The touch driving section is
an up-link transmission interval (ULNK) for transmitting a signal from the display device to the active pen;
and a down-link transmission interval (DLNK) for transmitting a signal from the active pen to the display device. 9. The method of claim 8,
During the down-link transmission interval (DLNK),
the first panel driving pulse signal is supplied to the panel;
the pen pulse signal representing the pen identification information is emitted from the active pen to the panel;
The pen data is wirelessly transmitted from the active pen to the wireless communication module,
During the uplink transmission interval (ULNK),
a second panel driving pulse signal or a third panel driving pulse is supplied to the panel;
the second panel driving pulse signal or the third panel driving pulse is input from the panel to the active pen;
The second panel driving pulse signal or the third panel driving pulse is
A touch sensing system distinguished from the first panel driving pulse signal. 10. The method of claim 9,
The first panel driving pulse signal is a signal having a periodic pattern in which a high-level section and a low-level section alternate;
The second panel driving pulse signal is a beacon signal carrying panel information,
The third panel driving pulse signal is a ping signal carrying touch driving section information,
The first panel driving pulse signal, the second panel driving pulse signal, and the third panel driving pulse signal are distinguished from each other. According to claim 1,
The active pen further includes a pen wireless communication unit for wirelessly transmitting the pen data,
The pen wireless communication unit,
A touch sensing system that spreads the spectrum of the pen data using a pseudo noise code and wirelessly transmits the pen data to the wireless communication module of the display device. A display device for performing pen recognition processing in conjunction with an active pen, the display device comprising:
a panel on which a plurality of touch electrodes are disposed;
A touch sensing circuit for outputting raw data that is read through the panel with a pen pulse signal emitted from the active pen to the panel and expressing pen identification information as a first panel driving pulse signal is supplied to the panel ;
a wireless communication module for receiving and outputting pen data wirelessly transmitted from the active pen; and
and a touch controller for acquiring pen identification information from the raw data output from the touch sensing circuit and performing pen recognition processing based on the acquired pen identification information and the pen data output from the wireless communication module; . a plurality of data lines arranged in a first direction;
a plurality of gate lines arranged in a second direction; and
It includes a plurality of touch electrodes for touch sensing,
During the display driving period,
an image data signal is applied to the plurality of data lines, and a gate signal is applied to the plurality of gate lines;
The touch driving section corresponding to the blank section between the two display driving sections includes an up-link transmission section and a down-link transmission section,
During the down-link transmission period,
A first panel driving pulse signal is applied to all or part of the plurality of touch electrodes,
During the up-link transmission interval,
A panel to which a second panel driving pulse signal or a third panel driving pulse signal distinct from the first panel driving pulse signal is applied to all or part of the plurality of touch electrodes. 14. The method of claim 13,
During the down-link transmission period,
a signal corresponding to the first panel driving pulse signal is applied to all or part of the plurality of data lines;
A panel to which a signal corresponding to the first panel driving pulse signal is applied to all or part of the plurality of gate lines. In the active pen interlocking with a display device,
a pen tip in contact with or proximate to a panel of the display device;
an analog front-end receiver configured to receive a first panel driving pulse signal supplied to the panel through the pen tip;
an analog front-end transmitter emitting a pen pulse signal representing pen identification information through the pen tip based on the first panel driving pulse signal; and
A pen wireless communication unit for wirelessly transmitting pen data,
The first panel driving pulse signal includes a plurality of panel driving pulses;
The pen pulse signal includes a plurality of pen pulses indicating a plurality of digital codes corresponding to the pen identification information, based on the first panel driving pulse signal;
the pen pulse signal including the plurality of pen pulses is radiated from the analog front end transmitter to the panel;
The display device performs pen recognition processing based on the pen identification information including the plurality of digital codes and the wirelessly transmitted pen data. delete 16. The method of claim 15,
A plurality of pen pulses included in the pen pulse signal,
a first pen pulse representing a first digital code;
a second pen pulse representing a second digital code;
The first pen pulse is
is pulsed at a rising time of a corresponding panel driving pulse among the plurality of panel driving pulses,
The second pen pulse is
An active pen that is pulsed at a falling time of a corresponding panel driving pulse among the plurality of panel driving pulses. 16. The method of claim 15,
The pen wireless communication unit,
In addition to the pen data, the active pen further transmits the pen identification information wirelessly. A method for recognizing a pen through interworking with an active pen of a display device, the method comprising:
a first step of supplying, by the display device, a first panel driving pulse signal to the panel;
a second step of, by the active pen, radiating a pen pulse signal indicating pen identification information to the panel through a pen tip based on the first panel driving pulse signal, and wirelessly transmitting pen data; and
a third step of performing, by the display device, pen recognition processing based on raw data generated by reading from the panel from which the pen pulse signal is emitted and the pen data wirelessly transmitted from the active pen; ,
The first panel driving pulse signal includes a plurality of panel driving pulses;
The pen pulse signal includes a plurality of pen pulses indicating a plurality of digital codes corresponding to the pen identification information, based on the first panel driving pulse signal;
In the second step, the pen pulse signal of the second step including the plurality of pen pulses is radiated to the panel;
In the third step, the display device acquires the pen identification information including the plurality of digital codes from the raw data, and the display device performs pen recognition processing based on the acquired pen identification information and the pen data. How to recognize a pen to perform. 20. The method of claim 19,
In the second step, the active pen wirelessly transmits the pen identification information in addition to the pen data. In the touch sensing system,
active pen; and
A display device comprising a panel on which a plurality of touch electrodes are disposed, and performing pen recognition processing in conjunction with the active pen,
The active pen is
radiating a pen pulse signal generated based on a first panel driving pulse signal supplied to the panel to the panel, and wirelessly transmitting pen identification information through a built-in pen wireless communication unit;
The display device is
a touch sensing circuit for supplying the first panel driving pulse signal to the panel and outputting raw data read from the panel from which the pen pulse signal is emitted;
a wireless communication module for receiving and outputting the pen identification information wirelessly transmitted from the active pen;
and a touch controller configured to perform pen recognition processing based on the raw data output from the touch sensing circuit and the pen identification information output from the wireless communication module. 22. The method of claim 21,
The pen pulse signal emitted from the active pen includes the pen identification information. 22. The method of claim 21,
The active pen is
A touch sensing system for wirelessly transmitting pen data along with the pen identification information through a built-in pen wireless communication unit.

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